Use of full stop after closing inverted comma, when the sentence enclosed with inverted commas has a full stop at the end
Solution 1:
Punctuation is a matter of style, and as such you should be guided by your manual of style. I use the Chicago Manual of Style, which advises
A period should be omitted at the end of a sentence that is included within another sentence.
On the side of the Atlantic that includes the CMS, periods and commas are placed inside quotation marks:
The judgment says, "John is guilty."
The rest of the world places them where they make sense
The judgment says, "John is guilty".